From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: Safety gap issues
Date: Tue, 22 Nov 2005 13:27:11 -0700
Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>
On 22 Nov 2005, at 12:19, Tesla list wrote:
> Original poster: "JT Bowles" <jasotb@xxxxxxxxxxx>
>
> Either I have constructed such a safety-perfect circuit, or my safety
> gap is being dumb.
>
> I added a grounded middle node, and now it NEVER fires.(I think i saw
> it fire twice in a couple minutes of operation). Whats the deal? I am
> using my RF ground, the same one attatched to my secondary. I spaced
> the safety gap JUST over what the main spark gap is set at. So, whats
> the deal? could by ground be so used up that it is actually repelling
> a spark in my safety gap?
>
> - I measured , with a ruler, it to be 8000 volts across the Saf. gap.
> -my main spark gap is set up at around 7300 volts (also measured with
> a ruler device) -my xformer is a 12,000 volt output *should I even
> worry about this*
No wonder it doesn't perform. The transformer's peak output is in the
vicinity of 17kV and you've got the main gap set to 7.5kV? Your coil
is using just 1/4 of the energy it could with the capacitor you're
using.
Malcolm
> Honestly being owned by my coil,
> JT Bowles
>
>
> >From: "Tesla list" <tesla@xxxxxxxxxx>
> >To: tesla@xxxxxxxxxx
> >Subject: Re: SIZE of RF chokes?
> >Date: Sun, 20 Nov 2005 16:42:20 -0700
> >
> >Original poster: "JT Bowles" <jasotb@xxxxxxxxxxx>
> >
> >YOU SAID
> >: "I happen to be the guy who created that formula. I use 140 volts
> >into the NST. This permits the NST to draw more than it's rated
> >power. Besides the formula is a guide, not an absolute limit. "
> >
> >
> >OH, HOLY CRAP. SORRY ABOUT THAT. DIDNT KNOW. Alright then, maybe you
> >can help me in the future, I need to go right now
> >
> >
> >>From: "Tesla list" <tesla@xxxxxxxxxx>
> >>To: tesla@xxxxxxxxxx
> >>Subject: Re: SIZE of RF chokes?
> >>Date: Sat, 19 Nov 2005 17:56:36 -0700
> >>
> >>Original poster: FutureT@xxxxxxx
> >>
> >>In a message dated 11/19/05 5:25:50 PM Eastern Standard Time,
> >>tesla@xxxxxxxxxx writes:
> >>
> >>
> >>>You said:
> >>> "You may be pleased to hear that my TT-42 coil which gives 42"
> >>>sparks from a 12/30 NST, does not use any filter. I just use
> >>>safety gaps."
> >>>
> >>>42 inches cant be correct. According to
> >>>the......universal......sparklength formula, you should only get a
> >>>max of 37" ( 1.7*sqrt inputpower ) in watts )
> >>
> >>
> >>I happen to be the guy who created that formula. I use 140 volts
> >>into the NST. This permits the NST to draw more than it's rated
> >>power. Besides the formula is a guide, not an absolute limit.
> >>
> >>
> >>>By the way now I hate your guts, considering you're using the exact
> >>>same transformer as I, but getting.......3 times more power coming
> >>>out. I dont realllly hate you but...you get the idea
> >>
> >>
> >>Ho, ho, I see what you're saying. We'll I'm sure you'll obtain the
> >>performance and safety you're looking for.
> >>
> >>
> >>>With my current system in place, I get 9 to 11 inch discharges to
> >>>the air, and when i add a breakout point, pointed at a grounded rod
> >>>- I can stretch it to 15.5 inches
> >>>
> >>>thats a total efficiency of about 50%
> >>>
> >>>OK, but using just a safety gap is BS, i saw your site dude. You
> >>>use a terry filter. NOt to mention, just because your coil performs
> >>>good, doesnt mean it will last forever. I am very happy with 15"
> >>>discharges if I could get my coil to last..... 5 or more years. I
> >>>care less about power.
> >>
> >>
> >>You're telling me that I use a terry filter? How could you come to
> >>that conclusion? It is a false statement. I don't use any filter
> >>on that coil. It's true my coil may not last as long as it would
> >>with a filter. If you're concerned more about having the coil last
> >>a long time and don't care about getting the longest sparks, that is
> >>fine. A filter won't hurt the performance too much anyway. I'm not
> >>telling you that you should avoid the filter. Filters are fine and
> >>very protective. I was just mentioning that I don't use a filter.
> >>
> >>Please don't send me any photos, although I appreciate the
> >>offer. I just don't have time....overloaded by emails already.
> >>
> >>John
>
>
>